Steam now offers the promised free release of an updated version of Alien Swarm, which includes the complete code base for the game. They say: "Available free of charge, the game thrusts players into an epic bug hunt featuring a unique blend of co-op play and squad-level tactics. Along with the game get the complete code base for Alien Swarm that features updates to the Source engine as well as the SDK."

ASeven wrote on Jul 19, 2010, 19:25:So, anyone has the game? How is it?

I just played for a few minutes in a public server to get a feel for the game and I had a blast. Runs smooth as silk, easy on the eyes and just, well, plays well. Gonna be on for a little while if anyone wants to play, just add me (see my sig).